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Phosphorus is obtained primarily from ores containing calcium phosphate.If a particular ore contains 58.5% calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosphorus?
Calculate the mass percent (m/m) for the solute in each of the following solutions: Express the answer using 2 sig figures.
the rate constant for a certain reaction is 5.80times10-3 . if the initial reactant concentration was 0.350 what will
Which of the following sets of quantum numbers or electron configurations cannot exist in a hydrogen atom? Why? a) n=2, l=2, m1=0 b) n=3, l=0, m1= -1 c)1p^3 d)3f^6
For the reaction occuring in acidic aqueous medium, balance the equation, such that all coefficients are the lowest possible integers
The pH of a 0.010 mol L-1 solution of a weak monoprotic acid is 2.09 at 25oC. What is the pKa for this acid
Calculate the mass/volume percent, % (m/v), for the solute in each of the following solutions. Express the answer using 2 sig figures.
If the volume of the cylinder is 4500 ml and the pressure of the N2 in it is 3.3 atm. (temperature is 25ºC). How many moles of nitrogen molecules are in the cylinder
You are given the following boiling point data: Which of the liquids would you expect to have the highest vapor pressure at room temperature
Natural gas is a mixture of many substances, primarily CH4,C2H6,C3H8 and C4H10. Assuming that the total pressure of the gases is 1.34 atm and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure (in atmospheres) of each g..
Assume that the kinetic energy of a 1250 kg car moving at 115 km/h could be converted entirely into heat. What amount of water could be heated from 19 C to 48 C by the car's energy.
When iodine solution is mixed with cyclooctene, the color of the iodine disappears. Write a reaction that shows the product
How many milliliters of 2.6 M NH4Cl must be added to 260 mL of 0.20 M NH3 to obtain a buffer solution having pH=9.40
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